KNZ-48452

TABLE OF CONTENTS APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 TEST REPORT CONTAINING: PAGE 1.....TEST PROCEDURE PAGE 2.....TEST PROCEDURE CONTD. & CIRCUIT DESCRIPTION PAGE 3.....72.11 MHz Tx RADIATION INTERFERENCE TEST DATA PAGE 4.....72.92 MHz Tx RADIATION INTERFERENCE TEST DATA PAGE 5.....OCCUPIED BANDWIDTH TEST DATA EXHIBITS ATTACHMENTS: EXHIBIT 1.........POWER OF ATTORNEY LETTER EXHIBIT 2.........LETTER CONFIRMING MODIFICATIONS EXHIBIT 3.........BLOCK DIAGRAM EXHIBIT 4.........SCHEMATIC EXHIBIT 5A-5B.... PARTS LIST EXHIBIT 6A-6D.....INSTRUCTION MANUAL EXHIBIT 7.........FCC ID LABEL SAMPLE EXHIBIT 8.........FCC ID LABEL LOCATION EXHIBIT 9.........WHOLE SET VIEW EXTERNAL PHOTOGRAPH EXHIBIT 10........FRONT VIEW EXTERNAL PHOTOGRAPH EXHIBIT 111.......REAR VIEW EXTERNAL PHOTOGRAPH EXHIBIT 12A-12B.. INTERNAL COMPONENT SIDE PHOTOGRAPH EXHIBIT 13........INTERNAL COPPER SIDE PHOTOGRAPH EXHIBIT 14........OCCUPIED CW PLOT EXHIBIT 15........OCCUPIED PLOT APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 REPORT #: F:\CUS\D\DSI\DSI59H9.RPT TABLE OF CONTENTS APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 TEST EQUIPMENT LIST 1. Spectrum Analyzer: Hewlett Packard 8566B - Opt 462, w/ preselector 85685A, & Quasi-Peak Adapter HP 8565OA, & HP 8449B - OPT H02 Cal. 6/26/98 2. Signal Generator, Hewlett Packard 8640B, cal. 10/1/98 3. Eaton Biconnical Antenna Model 94455-1 20-200 MHz Serial No. 0997 Cal. 10/30/98 4. Electro-Metric Dipole Kit, 20-1000 MHz, Model TDA-30 10/15/98 5. Electro-Metric Horn 1-18 GHz, Model RGA-180, Cal. 10/30/98 6. Electro-Metric Antennas Model TDA-30/1-4,Cal. 10/15/98 7. Electro-Metric Line Impedance Stabilization Network Model No. EM-7821, Serial No. 101; 100KHz-30MHz 50uH. Cal.11/19/98 8. Electro-Metric Line Impedance Stabilization Network Model No. EM-7820, Serial No. 2682; 10KHz-30MHz 50uH. Cal. 11/19/98 9. Special low loss cable was used above 1 GHz 10. Tenney Temperature Chamber TEST PROCEDURE GENERAL: This report shall NOT be reproduced except in full without the written approval of TIMCO ENGINEERING, INC. RADIATION INTERFERENCE: The test procedure used was ANSI STANDARD C63.4-1992 using a HEWLETT PACKARD spectrum analyzer with a prese- lector. The bandwidth of the spectrum analyzer was 100 kHz with an appropriate sweep speed. The analyzer was calibrated in dB above a microvolt at the output of the antenna. The resolution bandwidth was 100KHz and the video bandwidth was 300KHz. The ambient temperature of the UUT was &tempr& with a humidity of &humr&. FORMULA OF CONVERSION FACTORS: The Field Strength at 3m was estab- lished by adding the meter reading of the spectrum analyzer (which is set to read in units of dBuV) to the antenna correction factor sup- plied by the antenna manufacturer. The antenna correction factors are stated in terms of dB. The gain of the Preselector was accounted for in the Spectrum Analyzer Meter Reading. Example: Freq (MHz) METER READING + ACF = FS 33 20 dBuV + 10.36 dB = 30.36 dBuV/m @ 3m ANSI STANDARD C63.4-1992 10.1.7 MEASUREMENT PROCEDURES: The unit under test was placed on a table 80 cm high and with dimensions of 1m by 1.5m. The table used for radiated measurements is capable of continu- ous rotation. REPORT #: F:\CUS\D\DSI\DSI59H9.RPT PAGE #: 1 TEST PROCEDURES CONTINUED APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 When an emission was found, the table was rotated to produce the maximum signal strength. At this point, the antenna was raised and lowered from 1m to 4m. The antenna was placed in both the horizontal and vertical planes. The situation was similar for the conducted measurement except that the table did not rotate. The EUT was setup as described in ANSIC63.4-1992 with the EUT 40 cm from the vertical ground wall. CIRCUIT DESCRIPTION: When Unit A is turned on it transmits on 72.11MHz. This frequency is generated by oscillator Q3. From Q3 The signal is coupled through C30 to Q4. The transmitted signal is amplitude modulated by varing the supply voltage. The audio is picked up by the microphone MIC1 and fed to Q5 and Q6 the audio preamplifiers. From Q6 the aaudio is fed into the output amplifier KA2209 which drives the oudio output transformer T4 which modulates the supply voltage of Q4. From Q4 the modulated RF signal goes to T3 and T2 the double tuned circuits and to the low pass filter T1 and L2 to the antenna. In the receive mode that signal comes in on the antenna mixer Q1 which converts the signal down to a 810KHz IF. From Q1 the signal is coupled through the double tuned circuit B1 to IC LA7368P. The detected signal comes out Pin 9 to the volume contrrol VR2 and then to the audio amplifier TA7368P which is connected to the speaker SP1. When Unit B is turned on it transmits on 72.92MHz. This frequency again serves as both the transmitter carrier and the re- ceiver Local Oscillator. This signal provides low side injec- tion to produce a 810 kHz IF from an incoming 72.11 MHz. signal. ANTENNA_AND_GROUND_CIRCUITRY This unit makes use of a short, helical antenna. The antenna is inductively coupled. The antenna is self contained, no provision is made for an external antenna. This unit is powered from a 9.0V battery. No ground connection is provided. The unit relies on the ground track of the printed circuit board. APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 REPORT #: F:\CUS\D\DSI\DSI59H9.RPT PAGE #: 2 APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 NAME OF TEST: RADIATION INTERFERENCE RULES PART NO.: 15.237 REQUIREMENTS: THE FIELD STRENGTH OF ANY EMISSION WITHIN THE 200 kHz BAND SHALL NOT EXCEED 98.06 dBuV/M AT 3 METERS. THE FIELD STRENGTH OF ANY EMISSION OUTSIDE THE SPECIFIED 200 kHz BAND SHALL NOT EXCEED 63.52 dBuV/M AT 3 METERS. **HARMONICS MUST BE LOWER THAN FUNDAMENTAL TEST DATA: EMISSION METER READING COAX ANTENNA FIELD FREQUENCY AT 3 METERS LOSS CORRECTION STRENGTH MARGIN ANT. MHz dBuV dB FACTOR dB dBuV/m@3m dB POL. 72.11 20.90 0.80 7.86 29.56 68.50 H 144.22 2.30 0.80 16.90 20.00 43.52 H 216.33 3.60 1.20 12.40 17.20 46.32 H 288.44 3.00 1.40 14.96 19.36 44…

Text truncated - open the document above for the full version.

APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 NAME OF TEST: RADIATION INTERFERENCE RULES PART NUMBER: 15.209 REQUIREMENTS: 1.705 to 30 MHz: 49.54 dBuV/m @ 3 METERS 30 to 88 MHz: 40.00 dBuV/M @ 3 METERS 88 to 216 MHz: 43.52 dBuV/M 216 to 960 MHz: 46.02 dBuV/M ABOVE 960 MHz: 54.00 dBuV/M * Harmonics must be less than the fundamental. TEST RESULTS: A search was made of the spectrum from 25 to 1000 MHz and the measurements indicate that the unit DOES meet the FCC requirements. TEST DATA: EMISSION METER READING COAX ANTENNA FIELD FREQUENCY AT 3 METERS LOSS CORRECTION STRENGTH MARGIN ANT. MHz dBuV dB FACTOR dB dBuV/m@3m dB POL. 72.11 20.90 0.80 7.86 29.56 10.44 H 144.22 2.30 0.80 16.90 20.00 23.52 H 216.33 3.60 1.20 12.40 17.20 28.82 H 288.44 3.00 1.40 14.96 19.36 26.66 H 360.55 3.50 1.40 15.86 20.76 25.26 H 432.66 3.80 1.60 17.75 23.15 22.87 H 504.77 2.90 1.60 19.34 23.84 22.18 H 576.88 2.70 1.60 19.92 24.22 21.80 H 648.99 3.70 1.60 21.18 26.48 19.54 H 721.10 3.30 2.00 21.96 27.26 18.76 H SAMPLE CALCULATION: FSdBuV/m = MR(dBuV) + ACFdB. TEST PROCEDURE: ANSI STANDARD C63.4-1992 using a Hewlett Packard Model 8566B spectrum analyzer, a Hewlett Packard Model 85685A Preselector, a Hewlett Packard Model 85650A Quasi-Peak adapter, Electro-Metric Dipole kits, models TDA, TDS-25-1, TDS-25-2, and an Eaton Model 94455-1 Biconical Antenna. The bandwidth of spectrum analyzer was 100 kHz with an appropriate sweep speed. When an emission was found, the table was rotated to produce the maximum signal strength. The antenna was placed in both the horizontal and vertical planes and the worse case emissions were reported. PERFORMED BY: S. S. SANDERS DATE: March 29, 1999 REPORT #: F:\CUS\D\DSI\DSI59H9.RAD PAGE #: 3 APPLICANT: DSI (HK) LTD. FCC ID: KNZ-48452 NAME OF TEST: RADIATION INTERFERENCE RULES PART NUMBER: 15.209 REQUIREMENTS: 1.705 to 30 MHz: 49.54 dBuV/m @ 3 METERS 30 to 88 MHz: 40.00 dBuV/M @ 3 METERS 88 to 216 MHz: 43.52 dBuV/M 216 to 960 MHz: 46.02 dBuV/M ABOVE 960 MHz: 54.00 dBuV/M * Harmonics must be less than the fundamental. TEST RESULTS: A search was made of the spectrum from 25 to 1000 MHz and the measurements indicate that the unit DOES meet the FCC requirements. TEST DATA: EMISSION METER READING COAX ANTENNA FIELD FREQUENCY AT 3 METERS LOSS CORRECTION STRENGTH MARGIN ANT. MHz dBuV dB FACTOR dB dBuV/m@3m dB POL. 72.92 26.30 0.80 8.28 35.38 4.62 H 145.84 2.80 0.80 16.90 20.50 23.02 H 218.76 3.80 1.20 12.47 17.47 28.55 H 291.68 3.60 1.40 15.17 20.17 25.85 H 364.60 4.10 1.40 15.97 21.47 24.55 H 437.52 3.70 1.60 17.86 23.16 22.86 H 510.44 4.10 1.60 19.38 25.08 20.94 H 583.66 2.60 1.60 19.97 24.17 21.85 H 656.28 3.00 2.00 21.34 26.34 19.68 H 729.20 2.30 2.00 21.73 26.03 19.99 H SAMPLE CALCULATION: FSdBuV/m = MR(dBuV) + ACFdB. TEST PROCEDURE: ANSI STANDARD C63.4-1992 using a Hewlett Packard Model 8566B spectrum analyzer, a Hewlett Packard Model 85685A Preselector, a Hewlett Packard Model 85650A Quasi-Peak adapter, Electro-Metric Dipole kits, models TDA, TDS-25-1, TDS-25-2, and an Eaton Model 94455-1 Biconical Antenna. The bandwidth of spectrum analyzer was 100 kHz with an appropriate sweep speed. When an emission was found, the table was rotated to produce the maximum signal strength. The antenna was placed in both the horizontal and vertical planes and the worse case emissions were reported. PERFORMED BY: S. S. SANDERS DATE: March 29, 1999 REPORT #: F:\CUS\D\DSI\DSI59H9.RAD PAGE #: 4 ••••••••••••••••••••••••••••••••••••••••••••••••••••